Barlow and Jones (1999) found that soprano pipistrelle nursery roosts were significantly larger than common pipistrelle nursery roosts were significantly larger than common pipistrelle nursery roosts.
They are often seen flying together at dusk to reach communal roosts to spend the night.
Five species of bat are found on the site with two bat roosts found within 50 yards of the building.
These results can then be used to predict why some sites make more attractive maternity roosts than others.
Changes in the roofs of two nursery roosts have improved the environment for the bats during the breeding season.